CN107280814B - artificial joint - Google Patents
artificial joint Download PDFInfo
- Publication number
- CN107280814B CN107280814B CN201710610624.9A CN201710610624A CN107280814B CN 107280814 B CN107280814 B CN 107280814B CN 201710610624 A CN201710610624 A CN 201710610624A CN 107280814 B CN107280814 B CN 107280814B
- Authority
- CN
- China
- Prior art keywords
- prosthesis
- screw rod
- cavity
- reduction gearbox
- axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30721—Accessories
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention relates to the technical field of medical equipment, and particularly discloses an artificial joint which comprises a first prosthesis, a second prosthesis and a third prosthesis, wherein the second prosthesis is positioned between the first prosthesis and the third prosthesis, the first end of the first prosthesis is hinged with the first end of the second prosthesis, the second end of the second prosthesis is provided with a first cavity, and the first end of the third prosthesis is provided with a second cavity and extends into the first cavity; the first cavity is sequentially provided with a magnetic block, a reduction gearbox and a screw rod from one end close to the first prosthesis to one end far away from the first prosthesis; the input shaft of the reduction gearbox rotates around the axis of the input shaft under the drive of the magnetic block, the screw rod rotates around the axis of the screw rod under the drive of the output shaft of the reduction gearbox, and the screw rod extends into the second cavity and is in threaded connection with the second cavity; the second prosthesis is connected with the third prosthesis in a sliding way along the extending direction of the screw rod. The artificial joint provided by the invention can realize the extension of the prosthesis without secondary operation under the action of a driving magnetic field.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to an artificial joint.
Background
The number of primary osteosarcoma cases per year in China is about 1 ten thousand. Osteosarcoma accounts for 10% of primary bone tumors, 20% of primary malignant tumors, and the annual incidence rate is 1-3/100 ten thousand, wherein 75% of patients are aged 10-30 years, and are malignant tumors which seriously affect physical and mental health of young and strong.
The concept of limb protection has evolved over the last 25 years. The limb-protecting operation mainly comprises complete excision of affected bone tumor segments and reconstruction of bone defects, and various reconstruction techniques are used in the bone tumor diagnosis and treatment centers of the United states and Europe in the past two, three decades to reconstruct limbs after bone tumor excision. With the follow-up results of different reconstruction methods in recent years, the artificial metal prosthesis reconstruction obtains better medium-long-term follow-up results, and the advantages of the artificial prosthesis reconstruction include: the internal fixation is durable, the operation is immediate and stable, the short-term and long-term functional prognosis is good, and the joint mobility after the operation is good.
For adolescents, the growth of the distal femur and proximal tibia epiphysis plates accounts for 70% of the overall length of the lower limb's elevated development. Resection of the lower metaphyseal plate of the femur results in loss of the affected limb by about 1.6cm in length each year. For this reason, knee resections (often less than 10 years) in very young bone tumor patients necessarily result in severe limb inequality. For children bone tumor patients, complications such as limb inequality and lameness caused by reconstruction of tumor segment amputation prosthesis are increased gradually along with the gradual prolongation of the life cycle. Children have great growth capacity due to bones, and any metal prosthesis needs to be repaired finally along with the growth of the children.
At present, 10% of patients with primary bone tumor face the problem of limb inequality after limb protection operation. The unequal length of the limbs after the limb protection operation of children gradually becomes a hot spot problem in the field. The extendable prosthesis can better solve the problem, but as the current widely adopted extendable prosthesis needs to pass through an operation incision every time for extension, the prosthesis is extended by a mechanical driving device, the length of each extension is limited (the vascular nerve cannot withstand traction), and the infection probability and tissue scarring are increased by multiple operations. Thus, the current use of extensible prostheses by bone oncologists greatly increases the number of procedures and the chance of postoperative complications for pediatric patients. Such frequent surgical procedures will last ten years or more, causing considerable pain and economic burden to the patient.
Thus, there is a need for an artificial joint that can achieve extension of the prosthesis without requiring secondary surgery.
Disclosure of Invention
One object of the present invention is to: provided is an artificial joint which can realize the extension of a prosthesis without secondary operation under the action of a driving magnetic field.
To this end, the present invention provides an artificial joint comprising a first prosthesis, a second prosthesis and a third prosthesis, the second prosthesis being located between the first prosthesis and the third prosthesis, a first end of the first prosthesis being hingedly connected to a first end of the second prosthesis, a second end of the second prosthesis being provided with a first cavity, a first end of the third prosthesis being provided with a second cavity and extending into the first cavity;
the first cavity is sequentially provided with a magnetic block, a reduction gearbox and a screw rod from one end close to the first prosthesis to one end far away from the first prosthesis; the input shaft of the reduction gearbox rotates around the axis of the input shaft under the drive of the magnetic block, the screw rod rotates around the axis of the screw rod under the drive of the output shaft of the reduction gearbox, and the screw rod extends into the second cavity and is in threaded connection with the second cavity;
the second prosthesis is connected with the third prosthesis in a sliding manner along the extending direction of the screw rod.
Specifically, after the artificial joint is implanted into a human body, the human body grows over time, and thus, it is necessary to appropriately lengthen the entire length of the artificial joint. At this time, the limb implanted with the artificial joint is required to be placed in an alternating magnetic field, the S pole and the N pole of the alternating magnetic field can be continuously and alternately changed, and the magnetic block can rotate around the axis of the magnetic block at a high speed under the action of the alternating magnetic field. The magnetic block rotating at high speed drives the input shaft of the reduction gearbox to rotate, so that the output shaft drives the screw rod to rotate. Because the second prosthesis and the third prosthesis can only be connected in a sliding way along the extending direction of the screw rod, relative rotation perpendicular to the extending direction of the screw rod cannot occur, when the screw rod is connected with the second cavity in a threaded way, the second cavity is far away from the reduction gearbox along the extending direction of the screw rod, and finally the whole length of the artificial joint is increased. Of course, according to this principle, the second cavity may be also made to approach the reduction gearbox along the extending direction of the screw rod, and finally the overall length of the artificial joint is reduced. The first prosthesis and the second prosthesis are hinged to mimic a rotational connection at a joint of a person.
As a preferred embodiment, the magnetic block is fixed on the input shaft of the reduction gearbox, and the axis of the magnetic block is in a straight line with the axis of the input shaft of the reduction gearbox;
the output shaft of the reduction gearbox is fixedly connected with the screw rod, and the axis of the output shaft of the reduction gearbox and the axis of the screw rod are on the same straight line.
Preferably, the magnetic block is fixed on a first shaft, and the first shaft is connected with an input shaft of the reduction gearbox through a gear, a belt or a chain.
Preferably, the output shaft of the reduction gearbox is connected with the screw rod through a gear, a belt or a chain.
As a preferred embodiment, the inner wall of the first cavity is provided with a boss, the outer surface of the first end of the third prosthesis is provided with a chute, and the boss is inserted into the chute and is in sliding connection with the chute;
the extending direction of the sliding groove is parallel to the extending direction of the screw rod.
As a preferred embodiment, the inner wall of the first cavity is provided with a chute, the outer surface of the first end of the third prosthesis is provided with a boss, and the boss is inserted into the chute and is in sliding connection with the chute;
the extending direction of the sliding groove is parallel to the extending direction of the screw rod.
As a preferred embodiment, the magnetic block is a permanent magnet.
Specifically, the magnetic blocks are arranged to be permanent magnets, so that the risk of demagnetizing the magnetic blocks can be avoided.
As a preferred implementation manner, one end of the second prosthesis, which is close to the magnetic block, is provided with a plurality of through grooves, and the through grooves are communicated with the first cavity and the external space of the second prosthesis;
the through groove is filled with a plastic sealing plate.
Preferably, the number of the through grooves is 4.
Specifically, because the artificial joint is implanted into the human body, a patient can have a larger impact load when walking, standing or running, therefore, the main body part of the artificial joint (comprising a first prosthesis, a second prosthesis, a third prosthesis and the like) generally adopts a metal structure to increase the strength of the artificial joint, but the metal structure can cause shielding effect on a magnetic field, therefore, a through groove is required to be formed in the second prosthesis around the magnetic block, and a plastic sealing plate made of plastic material is implanted, so that the effect of coating and protecting the magnetic block can be achieved, and the external alternating magnetic field can be ensured to act on the magnetic block through the plastic sealing plate.
As a preferred embodiment, the reduction gearbox further comprises a reduction gear set, and an input shaft of the reduction gearbox is connected with an output shaft of the reduction gearbox through a reduction gear set gear;
the ratio of the rotational speed of the input shaft of the reduction gearbox to the rotational speed of the output shaft of the reduction gearbox is greater than or equal to 1000:1.
specifically, the magnetic block is of a cylindrical structure and is magnetized along the radial direction, and the material is neodymium iron boron magnetic material. The main purpose of the design of the reduction gearbox is to obtain larger output torque so as to rotate the screw rod. A large number of experiments show that when the reduction ratio is above 1000:1, the artificial joint can effectively overcome the tensile force between human tissue structures, and the output torque can be more smooth through the linear driving force of the third prosthesis converted by the lead screw.
As a preferred embodiment, the pitch of the screw is 1mm or more and 3mm or less.
Preferably, the pitch of the screw is 2mm. Since the reduction ratio is above 1000, it takes more than 1000 rotations of the permanent magnet per 2mm of movement of the third prosthesis, the alternating frequency of the external driving magnetic field is 50Hz (3000 RPM), and it takes about 3.5 minutes per 1-2mm of movement of the third prosthesis. Such a drive speed and extension time is acceptable for limb extension because the patient also needs to adapt slowly to the discomfort caused to him or herself while extending, without additional damage to the patient's body.
As a preferred embodiment, a nut is installed at one end of the second cavity near the reduction gearbox, the axis of the nut is on the same line with the axis of the output shaft of the reduction gearbox, and the nut is in threaded connection with the screw rod.
As a preferred embodiment, a stopper is provided in the middle of the third prosthesis, and the diameter of the stopper in a section perpendicular to the extending direction of the lead screw is larger than the diameter of the first cavity in a section perpendicular to the extending direction of the lead screw.
In particular, the stopper may prevent the third prosthesis from extending too far into the first cavity.
The beneficial effects of the invention are as follows: the artificial joint is provided, and the extension operation of the prosthesis can be completed without secondary operation under the action of a driving magnetic field by arranging the magnetic block, the reduction gearbox and the screw rod.
Drawings
The invention is described in further detail below with reference to the drawings and examples.
FIG. 1 is a schematic view of an artificial joint according to a first embodiment;
FIG. 2 is a schematic cross-sectional view of an artificial joint according to a first embodiment;
FIG. 3 is a schematic view of the structure of a third prosthesis provided in accordance with the first embodiment;
FIG. 4 is a schematic view of a magnetic driving platform according to a second embodiment;
fig. 5 is a schematic diagram of an internal structure of a magnetic driving platform according to a second embodiment.
In the figure:
1. a first prosthesis;
2. a second prosthesis; 201. a plastic sealing plate;
3. a third prosthesis; 301. a chute; 302. a limiting block;
4. a magnetic block;
5. a reduction gearbox; 501. an input shaft; 502. an output shaft;
6. a screw rod;
7. a nut;
8. a panel;
9. a frame; 901. a first upright; 902. a second upright; 903. a third upright; 904. a fourth upright; 905. a first upper cross bar; 906. a first middle cross bar; 907. a second middle cross bar; 908. a third middle cross bar; 909. a first lower cross bar; 910. a second bottom rail; 911. a third bottom rail;
10. a first separator;
11. a display screen;
12. an alternating magnetic field generator;
13. a saddle;
14. a universal wheel;
15. and (5) a handle.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 3, an artificial joint comprises a first prosthesis 1, a second prosthesis 2 and a third prosthesis 3, wherein the second prosthesis 2 is positioned between the first prosthesis 1 and the third prosthesis 3, a first end of the first prosthesis 1 is hinged with a first end of the second prosthesis 2, a second end of the second prosthesis 2 is provided with a first cavity, and a first end of the third prosthesis 3 is provided with a second cavity and extends into the first cavity. The first cavity is sequentially provided with a magnetic block 4, a reduction gearbox 5 and a screw rod 6 from one end close to the first prosthesis 1 to one end far from the first prosthesis 1; the input shaft 501 of the reduction gearbox 5 rotates around the axis of the input shaft 501 under the drive of the magnetic block 4, the lead screw 6 rotates around the axis of the screw rod 6 under the drive of the output shaft 502 of the reduction gearbox 5, and the lead screw 6 extends into the second cavity and is in threaded connection with the second cavity. The second prosthesis 2 is slidingly connected with the third prosthesis 3 along the extension direction of the screw 6.
Specifically, after the artificial joint is implanted into a human body, the human body grows over time, and thus, it is necessary to appropriately lengthen the entire length of the artificial joint. At this time, the limb implanted with the artificial joint is required to be placed in an alternating magnetic field, the S pole and the N pole of the alternating magnetic field can be continuously and alternately changed, and the magnetic block 4 can rotate around the axis of the magnetic block at a high speed under the action of the alternating magnetic field. The magnetic block 4 rotating at high speed drives the input shaft 501 of the reduction gearbox 5 to rotate, and the output shaft 502 drives the screw rod 6 to rotate. Because the second prosthesis 2 and the third prosthesis 3 can only be connected in a sliding way along the extending direction of the screw rod 6, and relative rotation perpendicular to the extending direction of the screw rod 6 cannot occur, when the screw rod 6 is connected with the second cavity in a threaded way, the second cavity is far away from the reduction gearbox 5 along the extending direction of the screw rod 6, and finally the whole length of the artificial joint is increased. Of course, according to this principle, it is also possible to bring the second cavity close to the reduction gearbox 5 along the extension direction of the screw rod 6, eventually achieving a reduction of the overall length of the artificial joint.
In this embodiment, the magnetic block 4 is fixed on the input shaft 501 of the reduction gearbox 5, and the axis of the magnetic block 4 is on the same line with the axis of the input shaft 501 of the reduction gearbox 5; the output shaft 502 of the reduction gearbox 5 is fixedly connected with the screw rod 6, and the axis of the output shaft 502 of the reduction gearbox 5 is in the same straight line with the axis of the screw rod 6. In other embodiments, the magnetic block 4 is fixed on a first shaft, and the first shaft is connected with the input shaft 501 of the reduction gearbox 5 through a gear, a belt or a chain; the output shaft 502 of the reduction gearbox 5 is connected with the screw rod 6 through a gear, a belt or a chain.
In this embodiment, a boss is disposed on the inner wall of the first cavity, a chute 301 is disposed on the outer surface of the first end of the third prosthesis 3, and the boss is inserted into the chute 301 and is slidably connected with the chute 301; the direction of extension of the slide 301 is parallel to the direction of extension of the screw 6, whereby a sliding connection of the second prosthesis 2 with the third prosthesis 3 in the direction of extension of the screw 6 is achieved. In other embodiments, the inner wall of the first cavity is provided with a sliding groove 301, and the outer surface of the first end of the third prosthesis 3 is provided with a boss, and the boss is inserted into the sliding groove 301 and is in sliding connection with the sliding groove 301; the extending direction of the slide groove 301 is parallel to the extending direction of the screw 6.
In this embodiment, the magnet 4 is a permanent magnet. Specifically, setting the magnet 4 as a permanent magnet can avoid the risk of the magnet 4 being demagnetized. In other embodiments, the magnet 4 may be a common magnet.
In this embodiment, the end of the second prosthesis 2 near the magnetic block 4 is provided with 4 through grooves, and the through grooves are communicated with the first cavity and the external space of the second prosthesis 2; the through grooves are filled with plastic sealing plates 201. Specifically, after the artificial joint is implanted into a human body, a patient has a large impact load when walking, standing or running, so that the main body part of the artificial joint (including the first prosthesis 1, the second prosthesis 2, the third prosthesis 3 and the like) generally adopts a metal structure to increase the strength of the artificial joint, but the metal structure can cause a shielding effect on a magnetic field, so that a through groove is required to be formed in the second prosthesis 2 around the magnetic block 4, and the plastic sealing plate 201 made of plastic material is implanted, so that the effect of protecting the magnetic block 4 by coating can be achieved, and the external alternating magnetic field can be ensured to act on the magnetic block 4 through the plastic sealing plate 201. In other embodiments, the number of through slots may be 1, 2, 3, or more.
In this embodiment, the reduction gearbox 5 further includes a reduction gear set, and the input shaft 501 of the reduction gearbox 5 and the output shaft 502 of the reduction gearbox 5 are connected through the reduction gear set; the ratio of the rotation speed of the input shaft 501 of the reduction gearbox 5 to the rotation speed of the output shaft 502 of the reduction gearbox 5 is equal to 1000:1. in other embodiments, the ratio of the rotational speed of the input shaft 501 of the reduction gearbox 5 to the rotational speed of the output shaft 502 of the reduction gearbox 5 is equal to 1100: 1. 1200: 1. 1300:1 or even greater. Specifically, the magnetic block 4 is in a cylindrical structure and is magnetized along the radial direction, and the material is neodymium iron boron magnetic material. The main purpose of the design of the reduction gearbox 5 is to obtain a large output torque and thus turn the screw 6. A large number of experiments show that when the reduction ratio is above 1000:1, the artificial joint can effectively overcome the tensile force between human tissue structures, and the output torque can be more smooth through the linear driving force of the third prosthesis 3 converted by the lead screw.
In this embodiment, the pitch of the screw 6 is 2mm. Since the reduction ratio is 1000 or more, it takes 1000 rotations or more of the permanent magnet per 2mm of movement of the third prosthesis 3, and the alternating frequency of the external driving magnetic field is 50Hz (3000 RPM), it takes about 3.5 minutes per 1-2mm of movement of the third prosthesis 3. Such a drive speed and extension time is acceptable for limb extension because the patient also needs to adapt slowly to the discomfort caused to him or herself while extending, without additional damage to the patient's body. In other embodiments, the screw pitch of the screw 6 is 1mm, 1.5mm, 2.5mm or 3mm.
In this embodiment, a nut 7 is installed at one end of the second cavity near the reduction gearbox 5, the axis of the nut 7 is on the same line with the axis of the output shaft 502 of the reduction gearbox 5, and the nut 7 is in threaded connection with the screw rod 6. Thereby realizing a threaded connection of the second cavity with the screw 6. In other embodiments, the threads may be directly machined into the second cavity, thereby achieving threaded connection of the second cavity to the screw 6.
In this embodiment, a limiting block 302 is disposed in the middle of the third prosthesis 3, and the diameter of the cross section of the limiting block 302 perpendicular to the extending direction of the screw rod 6 is larger than the diameter of the cross section of the first cavity perpendicular to the extending direction of the screw rod 6. In particular, the stop block 302 may prevent the third prosthesis 3 from extending too far into the first cavity.
Example two
The embodiment provides a magnetic drive platform, which can work together with the artificial joint in the first embodiment, provides a driving magnetic field for the artificial joint, and further realizes the extension of the prosthesis without secondary operation.
As shown in fig. 4 to 5, a magnetic drive platform comprises a frame 9 and a panel 8 covering the frame 9. The frame 9 comprises a first upright 901, a second upright 902, a third upright 903 and a fourth upright 904, all arranged vertically; the lengths of the first upright 901 and the second upright 902 are equal, the lengths of the third upright 903 and the fourth upright 904 are equal, and the length of the first upright 901 is greater than the length of the second upright 902; the upper end of the third vertical rod 903 is connected with the first vertical rod 901 through a first upper cross rod 905, the upper end of the third vertical rod 903 is connected with the upper end of the fourth vertical rod 904 through a second upper cross rod, and the upper end of the fourth vertical rod 904 is connected with the second vertical rod 902 through a third upper cross rod; the middle part of the third vertical rod 903 is connected with the first vertical rod 901 through a first middle cross rod 906, the middle part of the third vertical rod 903 is connected with the middle part of the fourth vertical rod 904 through a second middle cross rod 907, and the middle part of the fourth vertical rod 904 is connected with the second vertical rod 902 through a third middle cross rod 908; the lower end of the third upright 903 is connected to the first upright 901 by a first lower cross bar 909, the lower end of the third upright 903 is connected to the lower end of the fourth upright 904 by a second lower cross bar 910, and the lower end of the fourth upright 904 is connected to the second upright 902 by a third lower cross bar 911. An alternating magnetic field generator 12 is arranged between the first upper cross bar 905 and the first middle cross bar 906, two support rods with the extending direction parallel to that of the second middle cross bar 907 are arranged on the first middle cross bar 906 and the third middle cross bar 908, a saddle 13 is arranged on the support rods, and the alternating magnetic field generator 12 is fixed on the saddle 13. The alternating magnetic field generator 12 comprises a housing and a coil positioned inside the housing, and a cylindrical treatment channel is arranged in the middle of the alternating magnetic field generator 12, and the axis of the treatment channel is parallel to the extending direction of the second middle cross bar 907. The two side surfaces of the panel 8 perpendicular to the axis of the treatment channel are provided with treatment through holes, the axis of the treatment through holes and the axis of the treatment channel are on the same straight line, and the treatment through holes are communicated with the external space of the panel 8 and the treatment channel.
Specifically, the limb (upper arm, lower arm, thigh, calf, joint, etc.) into which the artificial joint has been implanted is extended into the treatment tunnel, and then the magnetic drive platform is activated. The alternating magnetic field generator 12 generates an alternating magnetic field at the periphery of the limb, and the magnetic block 4 can rotate around the axis of the alternating magnetic field at a high speed under the action of the alternating magnetic field. The magnetic block 4 rotating at high speed drives the input shaft 501 of the reduction gearbox 5 to rotate, and the output shaft 502 drives the screw rod 6 to rotate. Because the second prosthesis 2 and the third prosthesis 3 can only slide along the extending direction of the screw rod 6 and cannot rotate relatively perpendicular to the extending direction of the screw rod 6, when the screw rod 6 is in threaded connection with the second cavity, the second cavity is far away from the reduction gearbox 5 along the extending direction of the screw rod 6, and finally the whole length of the artificial joint is increased. Of course, according to this principle, it is also possible to bring the second cavity close to the reduction gearbox 5 along the extension direction of the screw rod 6, eventually achieving a reduction of the overall length of the artificial joint. The axis of the treatment channel is horizontally arranged, so that a human body can conveniently sit to extend hands into the treatment channel or can conveniently lie to extend feet into the treatment channel. Thereby achieving the purpose of extending the prosthesis without secondary operation. Furthermore, the basic principle of the magnetic drive platform is that alternating current is converted into alternating magnetic field, non-contact remote driving can be realized on the magnetic blocks 4 in the magnetic field range, especially in the field of medical surgery including orthopedics, the magnetic drive platform can remotely drive the magnetic blocks 4 in a human body to rotate in a non-contact state, and further non-invasive extension prosthesis operation without secondary operation is realized. Specifically, the frame 9 adopts an integral welding steel structure design, the panel 8 is made of bent steel plates, and the structure is compact and firm and is not easy to damage.
In this embodiment, the first top rail 905 and the third top rail are provided with a first partition board 10 disposed horizontally; the control device is fixed on the first partition board 10 through bolts, and the control device is electrically connected with the alternating magnetic field generator 12. Specifically, the control device comprises a DSP digital chip, a PID closed-loop control system, a PLC control unit and the like. The control device can intelligently control the power supply voltage, the power supply frequency, the magnetic field intensity, the magnetic field frequency and the like, and can correspondingly adjust according to actual requirements so as to achieve the optimal operation effect.
The display screen 11 is arranged on the panel 8, and the distance from the upper part of the display screen 11 to the first upright 901 is smaller than the distance from the lower part of the display screen 11 to the first upright 901; the display screen 11 is used for providing a man-machine interaction interface, and the display screen 11 is electrically connected with the control device. Specifically, setting the display screen 11 obliquely upward facilitates the patient or medical person to view the display screen 11 from top to bottom and to perform operations on the display screen 11. The user can directly read the working state of the magnetic drive platform through the display screen 11, including the working state and working parameters such as battery voltage, battery current, magnetic field intensity, magnetic field frequency, and the like, and can set and adjust the parameters according to actual needs. In this embodiment, the display screen 11 is a touch screen. Specifically, the touch screen is convenient and quick, easy to use, simple and visual. In other embodiments, the display screen 11 is a non-touch screen, and works in cooperation with physical keys electrically connected to the control device.
The first lower cross bar 909 and the third lower cross bar 911 are provided with a second partition plate horizontally arranged; the power supply system is fixed on the second partition board; a power system is located between the first bottom rail 909 and the first middle rail 906, the power system being electrically connected to the control means. In this embodiment, the power system includes a rectifying device, a dc power distribution device, a battery pack, a dc converter, and a rack power device. Specifically, the power supply system may convert the direct current of the battery pack into alternating current, thereby obtaining alternating current. The magnetic drive platform with the storage battery can be moved to any medical position at will without being limited by the position of the socket, and is convenient to use. In other embodiments, the power supply system may not be equipped with a battery pack, and may directly convert 220V household ac power into high-frequency exchange current.
In this embodiment, four universal wheels 14 are provided at the bottom of the frame 9, and handles 15 are provided at the front and rear of the panel 8. Specifically, four universal wheels 14 are additionally arranged at the bottom of the frame 9 so as to facilitate the integral movement, and a handle 15 is arranged on the panel 8 so as to facilitate the push-pull of the magnetic drive platform.
The terms "first," "second," "third," and the like herein are merely used for descriptive purposes and are not intended to be limiting.
It should be noted that the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present invention will not be described in any detail with respect to the possible combinations.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (7)
1. An artificial joint, which is characterized in that,
the device comprises a first prosthesis, a second prosthesis and a third prosthesis, wherein the second prosthesis is positioned between the first prosthesis and the third prosthesis, the first end of the first prosthesis is hinged with the first end of the second prosthesis, the second end of the second prosthesis is provided with a first cavity, and the first end of the third prosthesis is provided with a second cavity and extends into the first cavity;
the first cavity is sequentially provided with a magnetic block, a reduction gearbox and a screw rod from one end close to the first prosthesis to one end far away from the first prosthesis; the input shaft of the reduction gearbox rotates around the axis of the input shaft under the drive of the magnetic block, the screw rod rotates around the axis of the screw rod under the drive of the output shaft of the reduction gearbox, and the screw rod extends into the second cavity and is in threaded connection with the second cavity;
the second prosthesis is connected with the third prosthesis in a sliding manner along the extending direction of the screw rod;
the magnetic block is fixed on the input shaft of the reduction gearbox, and the axis of the magnetic block and the axis of the input shaft of the reduction gearbox are in the same straight line;
the output shaft of the reduction gearbox is fixedly connected with the screw rod, and the axis of the output shaft of the reduction gearbox and the axis of the screw rod are on the same straight line;
the speed reduction box further comprises a speed reduction gear set, and an input shaft of the speed reduction box is connected with an output shaft of the speed reduction box through a gear of the speed reduction gear set;
the ratio of the rotational speed of the input shaft of the reduction gearbox to the rotational speed of the output shaft of the reduction gearbox is greater than or equal to 1000:1, a step of;
the pitch of the screw rod is 2mm.
2. The prosthetic joint of claim 1, wherein the prosthetic joint comprises a bone graft material,
the inner wall of the first cavity is provided with a boss, the outer surface of the first end of the third prosthesis is provided with a chute, and the boss is inserted into the chute and is in sliding connection with the chute;
the extending direction of the sliding groove is parallel to the extending direction of the screw rod.
3. The prosthetic joint of claim 1, wherein the prosthetic joint comprises a bone graft material,
the inner wall of the first cavity is provided with a chute, the outer surface of the first end of the third prosthesis is provided with a boss, and the boss is inserted into the chute and is in sliding connection with the chute;
the extending direction of the sliding groove is parallel to the extending direction of the screw rod.
4. The prosthetic joint of claim 1, wherein the magnetic block is a permanent magnet.
5. The prosthetic joint of claim 1, wherein the prosthetic joint comprises a bone graft material,
a plurality of through grooves are formed in one end, close to the magnetic block, of the second prosthesis, and the through grooves are communicated with the first cavity and the external space of the second prosthesis;
the through groove is filled with a plastic sealing plate.
6. The prosthetic joint of claim 1, wherein the prosthetic joint comprises a bone graft material,
and a nut is arranged at one end of the second cavity, which is close to the reduction gearbox, the axis of the nut and the axis of the output shaft of the reduction gearbox are on the same straight line, and the nut is in threaded connection with the screw rod.
7. The prosthetic joint of claim 1, wherein the prosthetic joint comprises a bone graft material,
the middle part of the third prosthesis is provided with a limiting block, and the diameter of the cross section of the limiting block in the extending direction perpendicular to the screw rod is larger than that of the cross section of the first cavity in the extending direction perpendicular to the screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710610624.9A CN107280814B (en) | 2017-07-25 | 2017-07-25 | artificial joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710610624.9A CN107280814B (en) | 2017-07-25 | 2017-07-25 | artificial joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107280814A CN107280814A (en) | 2017-10-24 |
| CN107280814B true CN107280814B (en) | 2023-09-29 |
Family
ID=60102563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710610624.9A Active CN107280814B (en) | 2017-07-25 | 2017-07-25 | artificial joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107280814B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111803796B (en) * | 2020-07-28 | 2024-09-03 | 姬涛 | External adjusting driving device for noninvasive electromagnetic extension prosthesis of orthopedics department |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2758976A1 (en) * | 1997-01-31 | 1998-08-07 | Jean Louis Herve | Femoral bone growth prosthesis |
| US7485149B1 (en) * | 2003-10-06 | 2009-02-03 | Biomet Manufacturing Corporation | Method and apparatus for use of a non-invasive expandable implant |
| CN101500501A (en) * | 2006-06-13 | 2009-08-05 | 阿诺·苏贝朗 | Device for intrabody extension with screws working in traction |
| CN102144943A (en) * | 2011-04-27 | 2011-08-10 | 清华大学 | Non-invasive telescopic false body |
| WO2013126027A1 (en) * | 2012-02-24 | 2013-08-29 | Irsadi Istemi Alp Yuecel | Magnetic prolonged nail |
| CN104287874A (en) * | 2014-10-22 | 2015-01-21 | 广州新诚生物科技有限公司 | Extendable prosthesis for children |
| CN105662663A (en) * | 2016-03-18 | 2016-06-15 | 王威 | Implant capable of automatically extending |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040193266A1 (en) * | 2003-03-31 | 2004-09-30 | Meyer Rudolf Xaver | Expansible prosthesis and magnetic apparatus |
| US20110178604A1 (en) * | 2010-01-18 | 2011-07-21 | Biomet Manufacturing Corp. | Expandable Endoprosthesis |
-
2017
- 2017-07-25 CN CN201710610624.9A patent/CN107280814B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2758976A1 (en) * | 1997-01-31 | 1998-08-07 | Jean Louis Herve | Femoral bone growth prosthesis |
| US7485149B1 (en) * | 2003-10-06 | 2009-02-03 | Biomet Manufacturing Corporation | Method and apparatus for use of a non-invasive expandable implant |
| CN101500501A (en) * | 2006-06-13 | 2009-08-05 | 阿诺·苏贝朗 | Device for intrabody extension with screws working in traction |
| CN102144943A (en) * | 2011-04-27 | 2011-08-10 | 清华大学 | Non-invasive telescopic false body |
| WO2013126027A1 (en) * | 2012-02-24 | 2013-08-29 | Irsadi Istemi Alp Yuecel | Magnetic prolonged nail |
| CN104287874A (en) * | 2014-10-22 | 2015-01-21 | 广州新诚生物科技有限公司 | Extendable prosthesis for children |
| CN105662663A (en) * | 2016-03-18 | 2016-06-15 | 王威 | Implant capable of automatically extending |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107280814A (en) | 2017-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211024993U (en) | Leg lifting training device for early rehabilitation after hip replacement | |
| CN105662663B (en) | A kind of prosthese that can extend automatically | |
| CN111759431A (en) | Magnetic drive bone end retracting/pressurizing device | |
| CN107280814B (en) | artificial joint | |
| CN103143113A (en) | Therapeutic system of femoral head necrosis | |
| CN107625602A (en) | A kind of Orthopaedic nursing dressing change device | |
| CN201572292U (en) | Electric ankle joint exercise device | |
| CN107811789A (en) | A kind of Orthopaedic nursing cleaning device | |
| CN112741714B (en) | Can prolong low limbs joint prosthesis | |
| CN207477667U (en) | A kind of Medical orthopedic traction treatment supplemental training device | |
| CN109223409A (en) | A kind of division of endocrinology's physiotherapy couch | |
| CN206414454U (en) | It is a kind of to be used for the device that knee joint is fixed in tibial intramedullary nailing art | |
| CN203647887U (en) | Surgical treatment rack | |
| CN204931934U (en) | With the fracture of the lower limb exterior fixation bracket of physical therapy function | |
| CN211067218U (en) | Non-contact electromagnetic-driven noninvasive and extensible defect type artificial prosthesis | |
| CN107280747B (en) | Intramedullary pin | |
| CN111803796B (en) | External adjusting driving device for noninvasive electromagnetic extension prosthesis of orthopedics department | |
| CN212650899U (en) | Magnetic drive bone end retracting and pressurizing device | |
| CN212439716U (en) | In-vitro adjusting and driving device for orthopedic noninvasive electromagnetic extension prosthesis | |
| CN213130593U (en) | Orthopedic knee joint postoperative function exercise device | |
| CN205988480U (en) | A kind of heart pass postoperative care device | |
| CN108542662A (en) | A kind of support for nursing leg device | |
| CN211068341U (en) | Belt cleaning device is used in orthopedics nursing | |
| CN209018911U (en) | A kind of internal marrow dermoskeleton Conveyer | |
| Meswania et al. | Design and characterization of a novel permanent magnet synchronous motor used in a growing prosthesis for young patients with bone cancer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190219 Address after: 102200 2 Floor 02, No. 10 Baifuquan Road, Chengnan Street, Changping District, Beijing Applicant after: Beijing Megaborne Medical Equipment Co.,Ltd. Address before: Room 803, Unit 1, 7 Building, 66 Jingyang East Street, Shijingshan District, Beijing 100041 Applicant before: Wei Wei |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230726 Address after: Room A-3145, Floor 2, Building 3, Yard 30, Shixing Street, Shijingshan District, Beijing 100041 Applicant after: BEIJING HUAWEI ZHONGXING ELECTRIC Co.,Ltd. Address before: 102200 2 Floor 02, No. 10 Baifuquan Road, Chengnan Street, Changping District, Beijing Applicant before: Beijing Megaborne Medical Equipment Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |